java libraries: Fix warnings in eclipse.

services/sensors/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 if (is_android) {
   import("//services/android/rules.gni")
   import("//build/config/android/config.gni")
 
   mojo_android_java_application("sensors") {
     sources = [
-      "org/chromium/mojo/sensors/Sensors.java",
+      "src/org/chromium/mojo/sensors/Sensors.java",
     ]
 
     mojo_main = "org.chromium.mojo.sensors.Sensors"
 
     deps = [
       ":sensors_lib",
       "//mojo/public/interfaces/application:application_java",
       "//mojo/public/java:application",
       "//mojo/services/sensors/public/interfaces:interfaces_java",
     ]
   }
 
   android_library("sensors_lib") {
     java_files = [
-      "org/chromium/mojo/sensors/SensorForwarder.java",
-      "org/chromium/mojo/sensors/SensorServiceImpl.java",
+      "src/org/chromium/mojo/sensors/SensorForwarder.java",
+      "src/org/chromium/mojo/sensors/SensorServiceImpl.java",
     ]
 
     deps = [
       "//mojo/public/java:bindings",
       "//mojo/public/java:system",
       "//mojo/services/sensors/public/interfaces:interfaces_java",
     ]
   }
 }